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Btrfs: open_ctree: Fix possible memory leak 

After reading one of chunk or tree root tree's root node from disk, if the
root node does not have EXTENT_BUFFER_UPTODATE flag set, we fail to release
the memory used by the root node. Fix this.

Signed-off-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
This commit is contained in:
chandan 2015-10-05 22:14:25 +05:30 committed by Chris Mason
parent d9a0540a79
commit e5fffbac4a
1 changed files with 4 additions and 0 deletions
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4
fs/btrfs/disk-io.c
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@ -2842,6 +2842,8 @@ int open_ctree(struct super_block *sb,
!extent_buffer_uptodate(chunk_root->node)) {
printk(KERN_ERR "BTRFS: failed to read chunk root on %s\n",
sb->s_id);
if (!IS_ERR(chunk_root->node))
free_extent_buffer(chunk_root->node);
chunk_root->node = NULL;
goto fail_tree_roots;
}
@ -2880,6 +2882,8 @@ retry_root_backup:
!extent_buffer_uptodate(tree_root->node)) {
printk(KERN_WARNING "BTRFS: failed to read tree root on %s\n",
sb->s_id);
if (!IS_ERR(tree_root->node))
free_extent_buffer(tree_root->node);
tree_root->node = NULL;
goto recovery_tree_root;
}